Gold-saving table.



0. B. KING & J. W. FELLMETH. GOLD SAVING TABLE.

APPLICATION FILED SEPT. 28, 1910.

Patented Oct. 15, 1912.

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G. B. K ING & J. W. FELLMETH.

GOLD SAVING TABLE. APPLICATION FILED SEPT. 28, 1910.

1,041,486. Patent ed 0012.15, 19.12.

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TINTTED STATES PATENT OFFT CE.

CHARLES B. KING AND JACOB W. FELLMETI-I, OF MARION, OHIO, ASSIGNORS TO THE MARION STEAM SHOVEL COMPANY, OF MARION, OHIO, A. CORPORATION OF OHIO.

GOLD-SAVING TABLE.

Specification of Letters Patent.

Patented Oct. 15, 1912.

To all whom it may concern:

Be it known that we, CHARLES B. KING and JAooB W. FELLMETH, citizens of the United States, residing at Marion, in the county of Marion and State of Ohio, have invented certain new and useful Improvements in Gold-Saving Tables, of which the following is a specification, reference being had therein to the accompanying drawlngs.

This invention relates to gold saving tables such as are employed in connect1on with elevator dredges. In these dredges the material excavated is dumped into the upper end of the rotary inclined screen and is washed and disintegrated in that screen and discharged thereby into a distributing hopper, which, in turn, discharges it upon the gold saving tables over which it 1s carried by a stream of water. The gold is separated from the other material as it passes over the gold saving surfaces and the waste is discharged at the end of the table.

The object of this invention is to provide a gold saving table having a large amount of gold saving surface; to provide the table with channels having their receivlng ends arranged at diflerent points along the screen, those channels which have their receiving ends near the receiving end of the screen, and which, consequently, receive larger portions of the material, beingof greater length than those channels which have their receiving ends near the discharge end of the screen; to so construct and arrange the channels of the table as to cause the water flowing through the same to be greatly agitated and to be deepened toward the discharge end thereof, thus producing a very eflicient separation of the gold from the other material; and also, to provide auxiliary gold saving tables to receive from the lower portions of the channels of the main table such gold bearing sands as may have been carried over the gold saving surfaces of said channels by the strong flow of the water.

In the accompanying drawings, Figure 1 is a top, plan view of gold saving tables;

Fig 2 is a side elevation ofthe same; and

Fig. 3 is an end elevation thereof.

In these drawings we have illustrated one embodiment of our invention and have shown the same in connection with a feeding device which preferably constitutes a separator, such as a rotary screen 1 having its axis of rotation inclined. The material is discharged into the upper end of the rotary screen and water is fed into the screen through a water supply pipe 2, thereby washing the material, disintegrating the same and causing it to pass through the foraminous wall of the screen. Arranged below the screen is a distributing hopper 3 which receives the material from'the screen and, in turn, discharges the same onto the gold saving table. The feeding device or screen and the distributing hopper may be of any suitable character, those here shown being chosen for the purpose of illustration and being substantially the same as those shown and described in Patent N 0. 890,773, granted June 16, 1908, to George W. King and assigned to The Marion Steam Shovel Company.

Thegold saving table is here shown as comprlslng two sections, 4, each of which in efl ect constitutes a separate table. The two sections have their adjacent edges arranged close one to the other beneath the distributing hopper 3 and these edges are preferably inclined so that they extend substantially parallel with the axis of the rotary screen 1. The sections are inclined so that they diverge downwardly and each section is provided with a series of channels arranged to receive the material from the distributing hopper and having its lower surface provided with suitable gold separating devices, such as riftles and the like. A greater amount of material is naturally discharged by those portions of the screen adjacent to its receiving end than is discharged by those portions adjacent to the discharge end. Consequently, that portion of the table which receives the material from those portions of the screen near the receiving end thereof requires a larger gold saving surface to take care of the material than is required by that portion which receives the material from the lower portions of the screen. WVe, therefore, have so arrangedthe channels on each section of the table that those channels having their receiving ends near the upper end of the screen are of a greater length than those channels having their receiving ends near the lower end of the screen. Each section of the table preferably comprises two portions, an upper inclined portion 5 and a lower inclined portion 6 having its upper edge near the lower edge of the upper in- 110 clined portion 5; The upper inclined por-f end curved laterally and the side walls of these curved portions of the respective channels converge slightly. The lower portion 6 of the table is also provided with a series of channels 8 communicating with the cha'11-* nels 7 of the upper portion of the table. Each channel 8 communicates with two of the channels 7 and is of a width less than the combined width of the two channels. The channels 7 have their side walls converging, as above mentioned, to cause the same to register accurately with the receiving end of the channels 8. This arrangement of the channels produces what is in efiect an L-shaped channel having one arm divided into two parallel parts. By causing two of the channels 7 to discharge into a single channel 8 the water in this channel is raised to a greater depth than that of the channels 7 The curved portions of the channels 7 tend to agitate the rapidly moving water and this agitation takes place just as the water enters the deeper channel 8. This agitation, combined with the increased depth of the channel 8, serves to very efiectually separate the gold from the other material. It will be noted that by arranging the channels in the manner shown the outer ticles from being discharged with the waste we have provided the lower ends of the channels 8 with perforated plates 9 through which these finei. particles and a portion of the water will pass. Arranged beneath the lower portion 6 of the table is an auxiliary gold saving table 10 which receives these lighter particles and separates the gold therefrom. The waste material and the larger portion 01' the water is discharged from the lower ends of the channels 8 into suitable chutes 11, while the smaller portion of the water, which passes over the auxiliary table 10 and the particles of waste material which accompany the same, are discharged into a sluice-way 12 which carries the same overboard. By using the auxiliary separating table carrying a smaller stream of water we are enabled to; save a 1 very considerable amount of goldwhich would otherwise be carried out with the waste and lost. a 7

liVe wish it to be understood that we do not desire to be limited to the details of con struction shown and described, for obvious modifications will occur to a person skilled in the art. Having thus fully described our invention, what we claim as new anddesireto secure by Letters Patent, is

1. The combination, with a screen, of a" gold saving table atthe side of said screen and inclined both in the direction of the length of said screen and at an angle to the length thereof, said table having a plurality of angular channels, the upper portions of p p which are divided into a plurality of parts. 2. The combination, with an inclined screen, and a distributing hopper arranged beneath the same, of a gold saving table at the side of said distributing hopper and inclined both in the direction of inclination of said screen and at right angles to the length of said screen, said table having a plurality of L-shaped channels, the upper portions of each of said channels being divided into two parallel parts.

3. The combination, with a screen, and a 4. The combination, with a screen, and a distributing hopper arranged beneaththe same, of a gold saving table, composed of an upper and lower portion, at the side of said distributing hopper, said portions being at an angle to each other and each having a plurality of channels of unequal length, the channels of the upper portion having their side walls converging, and the channels of the lower portion receiving water and ma- 7 f V terial from a plurality of channels of the upper portion.

In testimony whereof, we atfix our signatures in presence of two witnesses.

CHARLES B. KING. JACOB W. FELLMETH.

VVitnesses':

' C. M. WRiGHT,

GEO. A. CHENEY.

Copies of this patent may be obtained for five cents each, by aiidressing the Commissioner of Patents,

Washington, 13. 0. a a 

